A semi-analytical approach on the effect of external lateral pressure on free vibration of joined sandwich aerospace composite conical-conical shells.
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| Title: | A semi-analytical approach on the effect of external lateral pressure on free vibration of joined sandwich aerospace composite conical-conical shells. |
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| Authors: | Heidari Soureshjani, Ali1 (AUTHOR), Talebitooti, Roohollah1 (AUTHOR) rtalebi@iust.ac.ir, Talebitooti, Mostafa2 (AUTHOR) |
| Source: | Aerospace Science & Technology. Apr2020, Vol. 99, pN.PAG-N.PAG. 1p. |
| Subjects: | Free vibration, Conical shells, Submerged structures, Pressure, Differential quadrature method, Sandwich construction (Materials) |
| Abstract: | This paper investigates the free vibrational behaviors of joined composite sandwich conical-conical shells under external lateral pressure. The corresponding equations are derived based on the first order shear deformation theory (FSDT). Herewith, free vibration equations are extracted via applying Hamilton's principle and considering initial mechanical stresses solved by static equilibrium equations. To establish the continuity of two conical shells, compatibility of displacements and stress resultants are satisfied at the junctions. The generalized differential quadrature (GDQ) method is adopted to discretize the governing equations for each conical segment, together with related boundary and continuity conditions in a meridian direction. In order to verify the results as well as representing the convergence of the presented approach, some pieces of case studies are accomplished. These studies provide a better exhibition of lateral pressure, cone angles and shell thickness influences on the free vibration of joined composite sandwich conical shells with various boundary conditions. Then, the effect of four different types of materials which are more applicable in pressurized environments such as underwater and submarine structures, i.e. polyetheretherketon (PEEK), polycarbonate (PC), solid propylene (SPP), and high density polyimide foam (HDPF) are investigated for the core layer. Critical buckling pressure in the present approach is obtained when the natural frequency takes the value of zero for the lowest pressure. Finally, the values of lateral pressure are selected considering the critical buckling pressure to avoid buckling occurrence. [ABSTRACT FROM AUTHOR] |
| Copyright of Aerospace Science & Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 141864138 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A semi-analytical approach on the effect of external lateral pressure on free vibration of joined sandwich aerospace composite conical-conical shells. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Heidari+Soureshjani%2C+Ali%22">Heidari Soureshjani, Ali</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Talebitooti%2C+Roohollah%22">Talebitooti, Roohollah</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rtalebi@iust.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Talebitooti%2C+Mostafa%22">Talebitooti, Mostafa</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Aerospace+Science+%26+Technology%22">Aerospace Science & Technology</searchLink>. Apr2020, Vol. 99, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Free+vibration%22">Free vibration</searchLink><br /><searchLink fieldCode="DE" term="%22Conical+shells%22">Conical shells</searchLink><br /><searchLink fieldCode="DE" term="%22Submerged+structures%22">Submerged structures</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure%22">Pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Differential+quadrature+method%22">Differential quadrature method</searchLink><br /><searchLink fieldCode="DE" term="%22Sandwich+construction+%28Materials%29%22">Sandwich construction (Materials)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This paper investigates the free vibrational behaviors of joined composite sandwich conical-conical shells under external lateral pressure. The corresponding equations are derived based on the first order shear deformation theory (FSDT). Herewith, free vibration equations are extracted via applying Hamilton's principle and considering initial mechanical stresses solved by static equilibrium equations. To establish the continuity of two conical shells, compatibility of displacements and stress resultants are satisfied at the junctions. The generalized differential quadrature (GDQ) method is adopted to discretize the governing equations for each conical segment, together with related boundary and continuity conditions in a meridian direction. In order to verify the results as well as representing the convergence of the presented approach, some pieces of case studies are accomplished. These studies provide a better exhibition of lateral pressure, cone angles and shell thickness influences on the free vibration of joined composite sandwich conical shells with various boundary conditions. Then, the effect of four different types of materials which are more applicable in pressurized environments such as underwater and submarine structures, i.e. polyetheretherketon (PEEK), polycarbonate (PC), solid propylene (SPP), and high density polyimide foam (HDPF) are investigated for the core layer. Critical buckling pressure in the present approach is obtained when the natural frequency takes the value of zero for the lowest pressure. Finally, the values of lateral pressure are selected considering the critical buckling pressure to avoid buckling occurrence. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Aerospace Science & Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ast.2019.105559 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Free vibration Type: general – SubjectFull: Conical shells Type: general – SubjectFull: Submerged structures Type: general – SubjectFull: Pressure Type: general – SubjectFull: Differential quadrature method Type: general – SubjectFull: Sandwich construction (Materials) Type: general Titles: – TitleFull: A semi-analytical approach on the effect of external lateral pressure on free vibration of joined sandwich aerospace composite conical-conical shells. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Heidari Soureshjani, Ali – PersonEntity: Name: NameFull: Talebitooti, Roohollah – PersonEntity: Name: NameFull: Talebitooti, Mostafa IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 12709638 Numbering: – Type: volume Value: 99 Titles: – TitleFull: Aerospace Science & Technology Type: main |
| ResultId | 1 |
